Question

I’m using phpMyAdmin and I was wondering if there is a way I can default a column to have the same value as another column?

Scenario

So I’m running a wordpress and I want to give users access to a page for a certain amount of time so I created a trialTime column. I want to default the value of trailTime to the users registrationDate (which is also a column). This way I can start the countdown from when they register but the admin will be able to reset the value of trialTime inside the admin panel if they want to.

Answer 1

If you are using wordpress and want to set certain user field at time of registration, just use *user_register* action hook.

function set_that_additional_thing ($user_id) {
     global $wpdb;
     $wpdb->query("UPDATE `" . $wpdb->prefix . "users` 
                   SET `copy_field` = `field` 
                   WHERE `user_id` = " . $user_id);
}

add_action('user_register', 'set_that_additional_thing ');